CN201272717Y - Intermittent unpowered vertical flow type constructed wetland sewage treatment system - Google Patents

Abstract

An intermittent unpowered vertical flow type constructed wetland sewage treatment system belongs to the field of environmental protection. The intermittent unpowered vertical flow type artificial wetland sewage treatment system consists of a sedimentation tank 1, a siphon type intermittent water inlet adjusting tank 2, a vertical flow type artificial wetland 3 and a water collecting tank 4. Sewage firstly enters a sedimentation tank for pretreatment, then enters a siphon type intermittent water inlet adjusting tank, intermittently flows into a vertical flow type artificial wetland for treatment according to a certain time interval in a siphon control mode, and effluent is collected in a water collecting tank so as to achieve various practical purposes. In the system, the siphon type intermittent water inlet adjusting tank has two alternative forms, namely a siphon type intermittent water inlet adjusting tank I and a siphon type intermittent water inlet adjusting tank II. The siphon type intermittent water inlet control mode is adopted to replace the conventional pump lifting intermittent water inlet control mode, and the problems that the vertical flow type artificial wetland is high in power consumption cost, incapable of guaranteeing power supply, complex in water pump maintenance and management and the like in the popularization process of vast rural areas and towns can be solved.

Description

An Intermittent Unpowered Vertical Flow Constructed Wetland Sewage Treatment System

Technical field:

The utility model belongs to the field of environmental protection, and relates to an intermittent unpowered vertical flow artificial wetland sewage treatment system, which is suitable for decentralized sewage treatment in vast rural areas and towns with relatively ample land conditions, and has the advantages of less investment, low operating costs and simple maintenance specialty.

Background technique:

Constructed wetlands refer to artificially designed and constructed wetlands according to people's needs by simulating the structure and function of natural wetlands, selecting a certain geographical location and topography. Constructed wetlands can be used for various purposes, such as production, living, disaster prevention and sewage treatment. The use of constructed wetlands to treat sewage is an ecological engineering technology developed in the 1970s. The constructed wetland sewage treatment system purifies sewage through the synergistic effect of fillers, aquatic plants and microorganisms, and has the advantages of low investment, low operating costs, and simple maintenance and management. The system has a wide range of applications, it can not only treat domestic sewage, but also can be used for advanced treatment of domestic sewage and industrial wastewater, and it can also be used for water replenishment and purification of landscape water, circulation and purification of landscape water itself, rainwater sewage treatment and non-point source pollution control, etc. It has a good application prospect. Constructed wetland covers a large area, and it has a good prospect for decentralized sewage treatment in rural areas and cities with abundant land conditions.

In the constructed wetland sewage treatment system, constructed wetlands can be divided into surface flow constructed wetlands, horizontal subsurface flow constructed wetlands, vertical flow constructed wetlands, and composite vertical flow constructed wetlands according to the characteristics of water flow. Among them, vertical flow constructed wetlands have gradually gained people's favor in recent years because of their high treatment efficiency, good denitrification effect, less short flow, no foul smell, and no breeding of mosquitoes and flies. The sewage flow direction of the vertical flow constructed wetland is from the top of the pool to the bottom of the pool through the filler, and through the joint action of the physical, chemical and biological processes of the wetland system, the purpose of sewage purification is achieved. The vertical flow constructed wetland adopts the intermittent water inflow operation mode, which can enhance the oxygenation capacity and improve the treatment efficiency of the wetland. At present, vertical flow constructed wetlands generally use pump lifting equipment for intermittent water inflow control. This control method is not difficult to promote in cities, but in the vast rural areas and towns, there are problems such as energy shortage, imperfect power supply system, and relative lack of technical force, so this control method will face high power consumption costs during the promotion process. , Unable to guarantee power supply, complex maintenance and management of water pumps and other obstacles. Therefore, if an alternative unpowered intermittent water inflow control method can be found, it will certainly have great application prospects.

Invention content:

The purpose of the present invention is to solve the problems of high power consumption cost, unguaranteed power supply, and complex maintenance and management of water pumps faced by vertical flow constructed wetlands in the promotion process of decentralized sewage treatment in vast rural areas and cities. Instead of the conventional pump lifting intermittent water inflow control mode, an intermittent unpowered vertical flow artificial wetland sewage treatment system is constructed.

An intermittent non-powered vertical flow constructed wetland sewage treatment system consists of a sedimentation tank, a siphon type intermittent inflow adjustment tank, a vertical flow constructed wetland, and a sump (see Figure 1). Sewage first enters the sedimentation tank for pretreatment, and then enters the siphon type intermittent water inflow adjustment tank. Under the siphon control mode, it flows intermittently into the vertical flow artificial wetland according to the set time interval for treatment.

The effluent of the sedimentation tank enters the siphon type intermittent water inflow regulating tank under the action of gravity through the overflow method. The siphon intermittent water inlet regulating tank is divided into two compartments, namely the siphon compartment and the water outlet compartment. The siphon compartment is used to receive the effluent from the sedimentation tank, which is the main part of the siphon intermittent water inlet adjustment tank, and the siphon effect occurs in this compartment. The water outlet compartment is used to temporarily store the outlet water of the siphon compartment, and plays a buffer role in the process of the outlet water entering the vertical flow artificial wetland of the next unit, so as to facilitate flow control. The siphon type intermittent water inlet adjustment tank can be cylindrical or cuboid, with no cover on the top (it can also be covered). The effluent from the adjustment pool is collected in the sump after being treated by the vertical flow artificial wetland, which can achieve various practical purposes.

In the intermittent non-powered vertical flow constructed wetland sewage treatment system, the height difference of each structure is lowered successively to ensure the stable operation of the whole process of sewage under the action of gravity, and the layout of each structure can be flexibly designed according to the local terrain .

The siphon type intermittent water inlet regulating tank designed by the present invention has two forms, i.e. siphon type intermittent water inlet regulating tank I (as shown in Figure 2) and siphon type intermittent water inlet regulating tank II (as shown in Figure 3), two The principle of the siphon device is the same, but the form is changed.

The siphon type intermittent water inlet regulating tank I includes a siphon compartment, a water outlet compartment, and an inverted U-shaped pipe. The height of the top of the inverted U-shaped pipe from the bottom of the pool is determined according to the water flow and intermittent operation time. The lengths of the two straight pipes of the inverted U-shaped pipe are different, and the length of the straight pipe in the siphon compartment is shorter than the length of the straight pipe in the water outlet compartment. When the water level in the siphon compartment is higher than the top of the inverted U-shaped tube, the siphon effect occurs, and the water starts to flow out of the siphon compartment until the water level drops below the short straight tube mouth of the inverted U-shaped tube.

The siphon intermittent water inlet regulating tank II includes a siphon compartment, a water outlet compartment, an L-shaped pipe, a suite, and a bracket. There is a suite outside the L-shaped pipe. The top seal has no bottom. It can be cylindrical or cuboid. There are several brackets to fix it on the wall of the siphon compartment or the ground at the bottom. The brackets do not block the flow of water up and down. The material of the suite is required to be both light and strong (such as PVC, PE or plexiglass, etc.), which is easy to install and take out, so as to facilitate fault inspection. The height from the top of the suite to the bottom of the pool and the length of the L-shaped pipe in the suite are determined according to the water flow and intermittent operation time. When the water level in the siphon compartment is higher than the top of the L-shaped tube, the siphon action occurs and water starts to flow out of the siphon compartment until the water level drops below the bottom of the suite and stops.

The utility model adopts the siphon type intermittent water inlet control method, which saves energy consumption and is easier to maintain and manage than the conventional pump lifting intermittent water inlet control method, and solves the problems existing in the promotion process of the vertical flow artificial wetland in the vast rural areas and urban sewage dispersion treatment. question. In addition, the constructed intermittent non-powered vertical flow constructed wetland sewage treatment system has a good sewage treatment effect, and the effluent can be reused according to local needs.

Description of drawings:

Figure 1: Schematic diagram of intermittent unpowered vertical flow constructed wetland sewage treatment system

Figure 2: Schematic Diagram of Siphon Intermittent Inlet Regulating Pool I

Figure 3: Schematic diagram of Siphon Intermittent Inlet Regulator II.

Illustration in the figure: 1. Sedimentation tank, 2. Siphon intermittent water inlet adjustment tank, 3. Vertical flow artificial wetland, 4. Water collection tank, 5. Siphon compartment, 6. Outlet compartment, 7. Inverted U-shaped pipe , 8. L-shaped pipe, 9. Suite, 10. Bracket

Detailed ways:

In Figure 1, the sewage first flows into the sedimentation tank 1, and after sedimentation pretreatment, most of the suspended solids and some organic matter are removed. The top of the sedimentation tank is covered, and the form can be one grid, two grids, or three grids, which can be selected according to needs.

The working principle of the siphon intermittent water-inflow regulating tank I and the siphonic intermittent water-inflow regulating tank II is the same, but the form of expression and the working process are different.

Among Fig. 2, in the siphon type intermittent water inlet regulating tank 1, the height of the top of the inverted U-shaped pipe 7 is determined according to the water inlet flow rate and the intermittent running time from the bottom of the pool. The lengths of the two straight pipes of the inverted U-shaped pipe 7 are different, and the length of the straight pipe in the siphon compartment 5 is shorter than the length of the straight pipe in the water outlet compartment 6 . When the water level in the siphon compartment 5 is higher than the top of the inverted U-shaped tube 7, the siphon effect occurs, and the water starts to flow out from the siphon compartment 5 until the water level drops below the short straight tube mouth of the inverted U-shaped tube 7. .

In Fig. 3, in the siphon type intermittent water inlet adjustment tank II, there is a suite 9 outside the L-shaped pipe 8, the top seal has no bottom, it can be columnar or cuboid, and the suite 9 is fixed on it with several brackets 10. The wall body or bottom ground of the siphon compartment 5, the support 10 does not block the circulation of water up and down. The material requirement of suite 9 is not only light but also strong (such as PVC, PE or plexiglass etc.), is convenient to install and take out, is beneficial to carrying out fault inspection. The height of the top of the suite 9 from the bottom of the pool and the length of the L-shaped pipe 8 in the suite 9 are determined according to the water inflow and the intermittent operation time. When the water level in the siphon compartment 5 is higher than the top of the L-shaped pipe 8, the siphon effect occurs and water starts to flow out of the siphon compartment 5 until the water level drops below the bottom of the suite 9 and stops.

The effluent of the siphon intermittent water inflow regulating tank 2 flows into the vertical flow artificial wetland 3 for treatment, and the area of the wetland is determined according to the influent water quality and effluent water requirements. After treatment, the effluent is collected at the bottom of the wetland and finally flows into the sump 4 .

In the entire intermittent non-powered vertical flow constructed wetland sewage treatment system, the walls of sedimentation tank 1, siphon intermittent inflow adjustment tank 2, vertical flow constructed wetland 3, and sump 4 can be made of bricks (low cost) Or reinforced concrete (high cost), choose according to economic conditions and service life, but the cover and bottom plate are recommended to be made of reinforced concrete.

Claims (4)

1. An intermittent non-powered vertical flow constructed wetland sewage treatment system is characterized in that it is composed of a settling tank (1), a siphon type intermittent water inlet regulating tank (2), a vertical flow constructed wetland (3), and a sump ( 4) Composition; the height difference of each structure decreases in turn, the water first enters the sedimentation tank for pretreatment, and then enters the siphon intermittent water inflow adjustment tank, and flows intermittently into the vertical flow artificial wetland according to the set time interval under the siphon control mode to process. 2. A kind of intermittent unpowered vertical flow type constructed wetland sewage treatment system as claimed in claim 1, it is characterized in that the effluent of the sedimentation tank (1) enters the siphon type intermittent water inlet regulating tank ( 2); the siphon intermittent water inlet regulating tank (2) is divided into two compartments, namely the siphon compartment (5) and the water outlet compartment (6); the siphon compartment (5) is used to receive water from the sedimentation tank (1) The outlet water is the main part of the siphon intermittent water inlet adjustment tank (2), where the siphon effect occurs; the outlet compartment (6) is used to temporarily store the outlet water of the siphon compartment, and the vertical In the process of the flow-type constructed wetland (3), it plays a buffering role to facilitate flow control; the siphon type intermittent water inlet adjustment pool (2) is cylindrical or cuboid in shape, with no cover or a cover on the top; the adjustment pool ( 2) The effluent is collected in the sump after being treated by the vertical flow artificial wetland. 3. A kind of intermittent unpowered vertical flow type constructed wetland sewage treatment system as claimed in claim 1 or 2, characterized in that the siphon type intermittent water inlet adjustment pool (2) consists of a siphon compartment (5), an outlet compartment ( 6), composed of inverted U-shaped pipes (7); the height of the top of the inverted U-shaped pipes (7) from the bottom of the pool is determined according to the influent flow rate and intermittent running time; the two sections of straight pipes of the inverted U-shaped pipes (7) The length is different, the length of the straight pipe in the siphon compartment (5) is shorter than the length of the straight pipe in the outlet compartment (6); when the water level in the siphon compartment (5) is higher than the top of the inverted U-shaped pipe (7) , the siphon effect takes place, and the water begins to flow out from the siphon compartment (5), and stops when the water level drops below the short straight pipe mouth of the inverted U-shaped pipe (7). 4. A kind of intermittent unpowered vertical flow type constructed wetland sewage treatment system as claimed in claim 1 or 2, characterized in that the siphon type intermittent water inlet adjustment pool (2) consists of a siphon compartment (5), a water outlet compartment ( 6), L-shaped pipe (8), suite (9), and bracket (10); there is a suite (9) outside the L-shaped pipe (8), the top seal has no bottom, is cylindrical or cuboid, and is formed by the bracket (10) suite (9) is fixed on the body of wall of siphon compartment (5) or the ground at the bottom, and support (10) does not block the circulation of water up and down; the material of suite (9) is PVC, PE or plexiglass.

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